PT  - JOURNAL ARTICLE
AU  - Elisabeth Flo
AU  - Ståle Pallesen
AU  - Torbjørn Åkerstedt
AU  - Nils Magerøy
AU  - Bente Elisabeth Moen
AU  - Janne Grønli
AU  - Inger Hilde Nordhus
AU  - Bjørn Bjorvatn
TI  - Shift-related sleep problems vary according to work schedule
AID  - 10.1136/oemed-2012-101091
DP  - 2013 Apr 01
TA  - Occupational and Environmental Medicine
PG  - 238--245
VI  - 70
IP  - 4
4099  - http://oem.bmj.com/content/70/4/238.short
4100  - http://oem.bmj.com/content/70/4/238.full
SO  - Occup Environ Med2013 Apr 01; 70
AB  - Objectives Shift-related sleep and sleepiness problems may be due to characteristics of both shifts (ie, day, evening and night shifts) and work schedules (ie, permanent vs rotational schedules). The Bergen Shift Work Sleep Questionnaire (BSWSQ) was used to investigate associations between shift-related sleep problems and work schedules. Methods 1586 nurses completed the BSWSQ. Participants who, in relation to a shift, ‘often’ or ‘always’ experienced both a sleep problem and a tiredness/sleepiness problem were defined as having shift-related insomnia (separate for day, evening and night shifts and rest-days). Logistic regression analyses were conducted for day, evening, night, and rest-day insomnia with participants on both permanent and rotational schedules. Results Shift-related insomnia differed between the work schedules. The evening shift insomnia was more prevalent in the two-shift rotation schedule than the three-shift rotation schedule (29.8% and 19.8%, respectively). Night shift insomnia showed higher frequencies among three-shift rotation workers compared with permanent night workers (67.7% and 41.7%, respectively). Rest-day insomnia was more prevalent among permanent night workers compared with two- and three-shift rotations (11.4% compared with 4.2% and 3.6%, respectively). Conclusions The prevalences of shift-related insomnia differed between the work schedules with higher frequencies for three-shift rotations and night shifts. However, sleep problems were present in all shifts and schedules. This suggests that both shifts and work schedules should be considered in the study of shift work-related sleep problems.